Latreille, 1802
Body somewhat dorsoventrally compressed. Rostrum absent or minute. Epistome fused with carapace. Anterior four pairs of pereiopods either not chelate or all chelate and with first pair of pereiopods long and slender. Tail-fan mostly pliable and somewhat translucent, or calcified having telson pointed.
This infraorder consists of 3 superfamilies: Eryonoidea De Haan, 1841, Glypheoidea Zittel, 1885, and Palinuroidea Latreille, 1802. Only the last of these contains species that are of commercial interest.